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#!/usr/bin/env python
def main(args):
"""Very simple script to guess at driver ADC values for useful voltages,
based on readings taken at other voltages.
"""
measurements = {}
readings_path = args[0]
for line in open(readings_path):
if line.startswith('#'):
continue
line = line.strip()
print('Line: %s' % (line))
parts = line.split()
if line.endswith('V'):
blinks = int(parts[0])
volts = float(parts[2][:-1])
measurements[volts] = blinks
v_lowest = min(measurements.keys())
v_highest = max(measurements.keys())
b_lowest = measurements[v_lowest]
b_highest = measurements[v_highest]
v_range = v_highest - v_lowest
b_range = b_highest - b_lowest
b_per_v = b_range / v_range
v_per_b = v_range / b_range
#for target_v in [4.20, 4.00, 3.80, 3.50, 3.00, 2.80, 2.70]:
for target_v in range(44, 19, -1):
target_v = target_v / 10.0
volts = target_v - v_lowest
blinks = b_lowest + (b_per_v * volts)
#print('%.2f - %.2fV' % (blinks, target_v))
print('#define ADC_%i %i' % (target_v * 10, round(blinks)))
if __name__ == "__main__":
import sys
main(sys.argv[1:])
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